EP1493999B1 - Gleichrichter Einheit und Befestigungsstruktur eines Gleichrichters - Google Patents

Gleichrichter Einheit und Befestigungsstruktur eines Gleichrichters Download PDF

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Publication number
EP1493999B1
EP1493999B1 EP04011281.5A EP04011281A EP1493999B1 EP 1493999 B1 EP1493999 B1 EP 1493999B1 EP 04011281 A EP04011281 A EP 04011281A EP 1493999 B1 EP1493999 B1 EP 1493999B1
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EP
European Patent Office
Prior art keywords
tube
lead
rectifier
spacer
rectifier unit
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Expired - Lifetime
Application number
EP04011281.5A
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English (en)
French (fr)
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EP1493999A3 (de
EP1493999A2 (de
Inventor
Satoshi Nozoe
Toshimitsu Fujiwara
Hidenari Kuribayashi
Osamu Makino
Tatsuhide Morisawa
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Omron Corp
Original Assignee
Omron Corp
Omron Tateisi Electronics Co
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Publication date
Application filed by Omron Corp, Omron Tateisi Electronics Co filed Critical Omron Corp
Publication of EP1493999A2 publication Critical patent/EP1493999A2/de
Publication of EP1493999A3 publication Critical patent/EP1493999A3/de
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Publication of EP1493999B1 publication Critical patent/EP1493999B1/de
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Classifications

    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F15—FLUID-PRESSURE ACTUATORS; HYDRAULICS OR PNEUMATICS IN GENERAL
    • F15D—FLUID DYNAMICS, i.e. METHODS OR MEANS FOR INFLUENCING THE FLOW OF GASES OR LIQUIDS
    • F15D1/00—Influencing flow of fluids
    • F15D1/001—Flow of fluid from conduits such as pipes, sleeves, tubes, with equal distribution of fluid flow over the evacuation surface
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F1/00—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow
    • G01F1/68—Measuring the volume flow or mass flow of fluid or fluent solid material wherein the fluid passes through a meter in a continuous flow by using thermal effects
    • G01F1/684—Structural arrangements; Mounting of elements, e.g. in relation to fluid flow
    • G—PHYSICS
    • G01—MEASURING; TESTING
    • G01F—MEASURING VOLUME, VOLUME FLOW, MASS FLOW OR LIQUID LEVEL; METERING BY VOLUME
    • G01F15/00—Details of, or accessories for, apparatus of groups G01F1/00 - G01F13/00 insofar as such details or appliances are not adapted to particular types of such apparatus

Definitions

  • the present invention relates to a rectifier unit equipped to a flowmeter that measures a flow volume of fluid, and more particularly to a rectifier unit and a rectifier attaching structure with enhanced rectifier attaching capability.
  • a flow sensor 124 serving as a flow rate sensor is generally attached to an intermediate portion of a flow channel 123 defined to transversely penetrate through a main body 122 of a flowmeter 121.
  • the flow sensor 124 measures a flow rate produced within the flow channel with the use of a flow chip, and outputs the measurement result in the form of a voltage, on the basis of which a flow volume is measured.
  • rectifiers 125 such as rectifier wire meshes, each rectifying fluid flowing from the upstream side of the flow sensor 124 to a homogeneous flow, are provided at regular intervals with spacers 126 being interposed along a flow channel direction (see, for example, JP-A-2-263117 ). Further, in order to close the portion of the spacers 126 in a reliable manner and prevent the fluid from leaking, a coupler 128 is attached while a sealing O-ring 127 is interposed at the end face of the flow channel 123 on the lead-in side.
  • a rectifier and a spacer are alternately inserted one by one in the tube from an opening of a lead-in tube of the flow channel to be pushed sequentially to the deepest portion of the lead-in tube, and this insertion operation has to be repeated as many times as the number of components that need to be attached, which makes the job quite troublesome.
  • a time needed for the insertion operation is extended as the diameter of the flow channel is reduced with a reduction in size and the rectifiers and the spacers become smaller as well, which lowers the working efficiency and deteriorates the assembling performance.
  • a need for a change to the specifications is to reduce the number of rectifiers to be provided from the predetermined regular number, in a space where the rectifiers and the spacers are to be provided, a total length in the channel flow direction becomes shorter by a thickness of the reduced rectifier(s), which gives rise to a clearance equivalent to the reduction.
  • the clearance may possibly cause the leakage of fluid, and it is therefore difficult to add a change to the specifications.
  • US 5 253 517 A discloses a flow converter for an air flow rate meter, especially for an intake conduit of an internal combustion engine, and includes a plastic flow rectifier for converting an aspirated air mass into a laminar air flow moving in a given flow direction.
  • the flow rectifier includes a honeycomb body and a ring integral with the honeycomb body.
  • the honeycomb body has a surface disposed at right angles to the given flow direction and the ring protrudes out of the surface.
  • a grid is permanently secured to the flow rectifier for generating microscopic eddies in the laminar air flow.
  • a method for producing a flow converter for an air flow rate meter includes integrally injection molding a thermoplastic flow rectifier for converting an aspirated air mass into a laminar air flow moving in a given flow direction.
  • the flow rectifier includes a honeycomb body having a surface disposed at right angles to the given flow direction and a ring protruding out of the surface.
  • the grid is permanently secured to the flow rectifier for generating microscopic eddies in the laminar air flow.
  • JP 11 132818 A discloses a flowmeter, wherein the flow passage has a larger inlet cross sectional area than the outlet cross sectional area and is tapered down from the inlet cross section to the outlet one, allowing dies to be easily drawn off from the passage after casting.
  • the passage is provided with protrusions for holding rectifier members.
  • US 5 672 821 A discloses a laminar flow device including a pluralty of disks and a plurality of spacers alternately stacked together.
  • the plurality of disks are defined by first disks and second disks, each of the first disks having a hole formed through a central portion thereof, and each of the second disks having a plurality of holes formed through an outer peripheral portion thereof.
  • the first disks and the second disks are alternately arranged with the spacer interposed between any two adjacent ones of the disks.
  • the invention therefore has an object to provide a rectifier unit and a rectifier attaching structure that enable efficient assembly to be achieved, by which plural rectifiers are readily inserted and attached inside the tube through a single insertion operation, and that can address a reduction of the flowmeter in size and a change to the specifications regarding the number of rectifiers to be provided.
  • One aspect of the invention provides a rectifier unit characterized by being provided with a spacer having an annular concave portion, at one end face, to accept a rectifier that rectifies fluid flowing through a flow channel in a flowmeter, a protruding annular convex portion, at the other end face, of a size to fit in the annular concave portion, and fixing means, on an outer surface, for fixing the spacer to a tube of the flow channel through engagement, and by being formed by integrating the spacer and the rectifier that are provided alternately in series in an axial direction into a tubular unit.
  • the rectifier referred to herein can be formed from a rectifier wire metal or an orifice capable of achieving the rectification function. Not only the same kind of rectifiers, but also different kinds of rectifiers can be combined.
  • the fixing means referred to herein is to fix the spacer I and the tube through engagement, and the spacer per se can be formed to have the fixing portion with respect to the tube.
  • the fixing means can be formed by providing a locking portion where the concave-to-convex correspondence is achieved between the inner surface of the tube and the outer surface of the spacer.
  • the spacers referred to herein not only secure intervals to provide the rectifiers at regular intervals in the flow channel direction, but also include the annular concave portion and convex portion at the front end face and the rear end face, respectively, so that plural spacers of the same shape can be linked in the axial direction.
  • annular convex portion of the following spacer in the annular concave portion of a given spacer while the rectifier is inserted in the annular concave portion, these two spacers can be linked to each other with the rectifier being interposed therebetween.
  • the rectifiers because as many rectifiers as needed are assembled temporarily in the rectifier unit before the rectifiers are attached to the tube, when the rectifiers are attached to the tube, plural rectifiers can be attached at a time by merely inserting the rectifier unit once. The rectifiers can be thus attached efficiently in a short time by saving labor.
  • the diameter of the flow channel is reduced, which in turn makes the rectifiers and the spacers smaller; however, these components can be still assembled temporarily at the outside. Moreover, because they can be attached by a single insertion operation, the assembling performance will not be deteriorated even when the size is reduced.
  • the rectifier unit can be assembled temporarily by confirming the presence or the absence of the rectifier for each spacer during a temporary assembling work before being inserted in the tube. Also, by making the respective spacers attachable/detachable at the linked portion where the concave-to-convex correspondence is achieved, it is possible to confirm the presence or absence of the rectifier even after the rectifier unit is temporarily assembled, by detaching a spacer of interest from the linked spacer.
  • the invention can be thus adapted to a case where the number of the rectifiers needs to be reduced, and is able to address the need for a change to the specifications regarding the number of the rectifiers to be provided.
  • the respective spacers forming the rectifier unit are the same components and can be used commonly, which enables the mass-production and the cost reduction of the spacers to be achieved.
  • a rectifier attaching structure characterized in that: a rectifier unit, attached inside a lead-in tube in front of a flow rate sensor provided to an intermediate portion of a flow channel in a flowmeter, includes a spacer having an annular concave portion, at one end face, to accept a rectifier that rectifies fluid flowing through the lead-in tube, a protruding annular convex portion, at the other end face, of a size to fit in the annular concave portion, and a locking claw, on an outer surface, for fixing the spacer to the lead-in tube through engagement, and is formed by integrating the spacer and the rectifier that are provided alternately in series in an axial direction into a tubular unit; and after the rectifier unit is inserted in the lead-in tube, a spacer positioned at an outer end of the rectifier unit is rotated to allow the locking claw of the spacer to engage with an engaging portion of the lead-in tube, thereby fixing the spacer to the lead-in tube so as
  • the locking claw of the spacer engages with the engaging portion of the lead-in tube.
  • the rectifier unit can be thus locked with the lead-in tube so as not to fall out.
  • the rotating operation can be readily achieved by rotating the spacer from the outside of the lead-in tube, for example, with the use of a jig.
  • an insertion guiding groove to guide the locking claw to be inserted may be formed in an inner surface of the lead-in tube in an axial direction, and a locking portion may be provided by forming a notched locking groove communicating with the insertion guiding groove, so that the locking claw of the spacer, opposing the insertion guiding groove at an outer end of the lead-in tube after insertion, is allowed to rotate from the insertion guiding groove in a circumferential direction.
  • the locking claw of the spacer engages with the locking groove of the lead-in tube, and they are locked integrally with each other. It is thus possible to attach the spacers and the lead-in tube integrally by providing a single spacer with the locking function.
  • This makes it possible to achieve an attaching structure omitting a member, such as a coupler. Hence, not only can the attaching structure suitable for a reduction in size be achieved, but also the cost can be saved by reducing the number of components.
  • the rectifier unit may be attached while a spring washer is interposed between opposing surfaces of a deepest portion of the lead-in tube and an inner end face of the rectifier unit inserted in the lead-in tube.
  • the rectifier unit may be inserted and attached to a lead-out tube in the rear of the flow rate sensor provided at the intermediate portion of the flow channel in the flowmeter.
  • the attachment position of the rectifier unit is not limited to the lead-in tube side, and it can be attached to the lead-out tube side as well.
  • the rectifier unit plays a role of preventing intrusion of dust from the lead-out tube side, as well as a role of suppressing the influences of pulsation.
  • a pump is used as an example of the pulsation
  • a change in pressure occurs inside the tube.
  • the rectifier unit suppresses the pulsation so as not to give adverse influences to the rectification characteristic.
  • a flowmeter 11 includes a flow channel 13 in the shape of a straight tube that transversely penetrates through a rectangular main body 12 in the longitudinal direction.
  • the flowmeter 11 is provided with a lead-in tube 14 protruding forward to serve as an inflow piping portion, at the inflow side of the flow channel 13, and a lead-out tube 15 protruding backward to serve as an outflow piping portion, at the outflow side.
  • a flow sensor 16, serving as a flow rate sensor, is engaged upon the intermediate portion of the flow channel 13 to measure a flow volume of a gas flowing through the flow channel 13.
  • a first rectifier unit U1 is attached inside the lead-in tube 14 to make a flow rate distribution homogeneous by eliminating an irregularity in flow rate.
  • a second rectifier unit U2 is also attached inside the lead-out tube 15 to suppress influences from the lead-out side, such as a change in pressure.
  • the first rectifier unit U1 is formed by integrating plural spacers 17 of the identical shape and plural meshes 18 of the identical shape, provided alternately in series in the axial direction, into a tubular unit.
  • each spacer 17 includes an annular concave portion 19 to accept the disc-like mesh 18 at one end face (rear end) of the tube, and a protruding annular convex portion 20 of a size to fit in the annular concave portion 19 at the other end face (front end) of the tube, and is thereby formed as a stepped tube having a large diameter portion and a small diameter portion in parallel in the axial direction of the tube.
  • the annular concave portion 19 is set to have a sufficient concave depth to pinch the thin mesh 18 between the inner surface of the annular concave portion 19 and the annular convex portion 20 of another spacer 17 when the annular convex portion 20 of another spacer 17 is fit in the annular concave portion 19 after the mesh 18 is inserted in pinching the mesh 18 therebetween.
  • the fitting strength between the annular concave portion 19 and the annular convex portion 20 is set to achieve a relatively loose linking state such that allows the linked spacers 17 to rotate at the linked portion during a locking operation described below.
  • convex protrusions serving as small locking claws 21 are provided at the top and bottom on the outer surface of the large diameter portion of the spacer 17, and these locking claws 21 engage with the lead-in tube 14 described below for fixation.
  • a positioning protrusion 22 is provided on part of the outer surface of the small diameter portion of the spacer 17, and when two spacers 17 are linked, the positioning protrusion 22 of one spacer 17 engages with a positioning groove 23 formed in an inner surface of the annular concave portion 19 of the other spacer 17.
  • the protruding locking claws 21 on the outer surface of the first rectifier unit U1 assembled by linking the respective spacers 17 can be aligned linearly in the axial direction, which makes the attachment to the lead-in tube 14 described below easier.
  • a jig attaching groove 24 (see FIG. 5 ) is formed in the inner surface of the annular concave portion 19 for a spacer rotating operation to attach the spacers 17 to the lead-in tube 14 by rotating the spacers 17.
  • Used as the mesh 18 is a thin disc made of an extremely fine wire mesh or the like capable of rectifying a gas flowing through the flow channel 13, and of a size small enough to be accommodated in the annular concave portion 19 of the spacer 17.
  • the first rectifier unit U1 When the first rectifier unit U1 is attached to the lead-in tube 14, it is suitable to incorporate an annular, corrugated spring washer 25 together with the first rectifier unit U1.
  • the first rectifier unit U1 becomes able to exert a function of providing a loose-less, integrally linked state among all the spacers 17 present from the deepest portion of the lead-in tube 14 to the outer end of the lead-in tube 14 , due to the elastic function of the spring washer 25.
  • Concave insertion guiding grooves 26, each guiding the locking claw 21 to be inserted along the axial direction, are formed at the top and bottom on the inner surface of the lead-in tube 14 in the axial direction.
  • notched locking grooves 27 communicating with the insertion guiding grooves 26 are formed. These locking grooves 27 allow the locking claws 21 on the top and bottom of the spacer 17, opposing the insertion guiding grooves 26 at the outer end of lead-in tube 14 after insertion, that is, when the first rectifier unit U1 is inserted as far as the deepest portion of the lead-in tube 14, to rotate slightly from the insertion guiding grooves 26 in the circumferential direction.
  • the first rectifier unit U1 when the first rectifier unit U1 is attached to the lead-in tube 14, by rotating, from the outside, one spacer 17 positioned at the outer end of the first rectifier unit U1, which is the only one spacer 17 that is exposed through the opening end of the lead-in tube 14, the locking claws 21 on the top and bottom of this spacer 17 engage with the locking grooves 27 on the top and bottom of the lead-in tube 14.
  • the first rectifier unit U1 is thus locked integrally with the lead-in tube 14, which in turn fixes the former to the latter so as not to fall out.
  • the spacer 17 When one spacer 17 positioned at the outer end of the lead-in tube 14 is rotated, the spacer 17 is rotated by placing an unillustrated jig in the jig attaching groove 24 of the spacer 17. That is, only a single spacer 17 positioned at the outer end of the lead-in tube 14 is rotated while the rest of the spacers 17 are left intact.
  • the concave-to-convex fitting state between the spacer 17 positioned at the outer end of the first rectifier unit U1 and the spacer 17 linked to the inner side thereof is a fitting state such that allows the former spacer 17 to rotate during the locking operation.
  • the degree of engagement between the positioning protrusion 22 of the spacer 17 at the outer end and the positioning groove 23 in the annular concave portion 19 of the spacer 17 at the inner side is set to an engagement degree sufficiently low to allow the spacer 17 at the outer end to rotate by surmounting the positioning engaging portion.
  • the second rectifier unit U2 will now be described.
  • the second rectifier unit U2 is configured substantially in the same manner as the first rectifier unit U1 described above, and as are shown in FIG. 9 through FIG. 11 , the differences are that fewer spacers 17 are used (three in the drawings) and one mesh 18 is replaced with one orifice 28. The following description will describe only these differences.
  • the orifice 28 has a disc of the same size as the meshes 18, which is small enough to be accommodated in the annular concave portion 19 of the spacer 17, and is provided with a central hole 29 slightly opened at the center. This configuration makes it possible to suppress adverse influences from the lead-out tube 15 side, such as a change in pressure.
  • the second rectifier unit U2 is attached to the lead-out tube 15 in the rear of the flowmeter 11 by being inserted therein, in the same manner as the first rectifier unit U1.
  • reference numerals 30 and 31 denote a connector and a main body fixing portion, respectively.
  • the spring washer 25 is inserted through the opening end of the lead-in tube 14 first, and thence the first rectifier unit U1 is inserted to the deepest portion of the lead-in tube 14 while the locking claws 21 at the top and bottom of the first rectifier unit U1 are engaged with the insertion guiding grooves 26 at the top and bottom of the lead-in tube 14. Finally, by slightly rotating the spacer 17 positioned at the opening end of the lead-in tube 14 with an unillustrated jig, the locking claws 21 on the top and bottom are locked in the locking grooves 27 of the lead-in tube 14. The first rectifier unit U1 is thus fixed integrally to the lead-in tube 14 so as not to fall out.
  • the tubular first rectifier unit U1 only has to be inserted when it is attached to the lead-in tube 14, which makes it possible to attach plural meshes 18 at a time.
  • the assembler is thus able to finish the attaching job efficiently in a short time by saving labor.
  • the spring washer 25 is inserted through the opening end of the lead-out tube 15 first, and thence the second rectifier unit U2 is inserted to the deepest portion of the lead-out tube 15 while the locking claws 21 on the top and bottom of the second rectifier unit U2 are engaged with the insertion guiding grooves 26 at the top and bottom of the lead-out tube 15.
  • the spacer 17 positioned at the opening end of the lead-out tube 15 with the use of an unillustrated jig, the locking claws 21 at the top and bottom are locked in the locking grooves 27 of the lead-out tube 15.
  • the second rectifier unit U2 is thus fixed integrally to the lead-out tube 15 so as not to fall out.
  • the tubular second rectifier unit U2 only has to be inserted when it is attached to the lead-out tube 15, which makes it possible to attach the meshes 18 and the orifice 28 efficiently at a time.
  • the spacers 17 and the meshes 18 are integrated into a unit to be attached at a time, not only can the attaching operation be simpler, but also a suitable attaching structure for a reduction of the flowmeter in size can be achieved.
  • a suitable attaching structure for a reduction of the flowmeter in size can be achieved.
  • these components can be assembled temporarily in a unit. More importantly, they can be attached through a single insertion operation. Hence, there is no deterioration in assembling performance even when the size is reduced.
  • the embodiment can be adapted to a case where the number of the meshes 18 to be provided to the lead-in tube 14 or the lead-out tube 15 needs to be less than the regular number. In this case, merely a spacer 17 accommodating the mesh 18 and an empty spacer 17 accommodating no mesh 18 are linked. Even when fewer meshes 18 are used, the respective spacers 17 are fit in one another through the concave-to-convex correspondence, and no rattling will occur in the axial direction. Hence, there will be no dimensional error.
  • the embodiment can be therefore adapted to a case where the number of the meshes 18 needs to be reduced, and is thus able to address a need for a change to the specifications.
  • the respective spacers 17, forming stepped-tubes used as the rectifier units U1 and U2 are the same components and can be used commonly, which enables the mass-production and the cost reduction of the spacers 17 to be achieved.

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  • Physics & Mathematics (AREA)
  • Fluid Mechanics (AREA)
  • General Physics & Mathematics (AREA)
  • Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • General Engineering & Computer Science (AREA)
  • Measuring Volume Flow (AREA)
  • Details Of Flowmeters (AREA)

Claims (5)

  1. Gleichrichtereinheit, umfassend:
    zumindest einen Abstandshalter (17) und
    zumindest einen Gleichrichter (18);
    wobei der Abstandshalter (17) aufweist
    einen ringförmigen konkaven Abschnitt (19) an einer Endfläche, wobei der ringförmige konkave Abschnitt (19) zur Aufnahme des Gleichrichters (18) ausgebildet ist, der für die Gleichrichtung von durch einen Strömungskanal (13) in einem Durchflussmesser (11) strömendem Fluid ausgebildet ist,
    einen hervorstehenden ringförmigen konvexen Abschnitt (20) an der anderen Endfläche, wobei der hervorstehende ringförmige konvexe Abschnitt (20) eine Größe derart aufweist, dass er in den ringförmigen konkaven Abschnitt (19) einführbar ist, und
    eine Befestigungseinrichtung (21) an einer Außenfläche, wobei die Befestigungseinrichtung (21) für die Befestigung des Abstandhalters (17) an einem Rohr (14) des Strömungskanals (13) mittels Eingriff ausgebildet ist,
    wobei die Gleichrichtereinheit so geformt ist, dass durch Zusammenbauen des Abstandhalters (17) und des Gleichrichters (18) mehrere integrierte Einheiten von Abstandshaltern (17) und Gleichrichtern (18) abwechselnd in Serie in einer Axialrichtung geschaffen werden können, um eine rohrförmige Einheit zu bilden.
  2. Gleichrichterbefestigungsstruktur, umfassend:
    eine Gleichrichtereinheit gemäß Anspruch 1 und
    ein Zuleitungsrohr (14),
    wobei die Gleichrichtereinheit innerhalb des Zuleitungsrohrs (14) befestigt ist, das so ausgebildet ist, dass es sich vor einem Durchflussratensensor (16) befindet, der an einem Zwischenabschnitt eines Strömungskanals (13) in einem Durchflussmesser (11) vorgesehen ist,
    wobei der Gleichrichter (18) der Gleichrichtereinheit ausgebildet ist, das Zuleitungsrohr (14) durchströmendes Fluid gleichzurichten, und die Befestigungseinrichtung (21) der Gleichrichtereinheit eine Verriegelungsklaue ist; und
    wobei die Gleichrichtereinheit und das Zuleitungsrohr (14) so ausgebildet sind, dass, nachdem die Gleichrichtereinheit in das Zuleitungsrohr (14) eingesetzt worden ist, der Abstandshalter (17) der Gleichrichtereinheit, positioniert an einem äußeren Ende der Gleichrichtereinheit, ausgebildet ist, gedreht zu werden, um es der Verriegelungsklaue (21) des Abstandhalters (17) zu ermöglichen, in Eingriff mit einem Eingriffsabschnitt (27) des Zuleitungsrohrs (14) zu gelangen, wodurch der Abstandshalter (17) derart an dem Zuleitungsrohr (14) befestigt wird, dass der Abstandshalter (17) nicht herausfällt.
  3. Gleichrichterbefestigungsstruktur nach Anspruch 2, wobei:
    eine Einsetzungsführungsnut (26) zum Führen der einzusetzenden Verriegelungsklaue (21) an einer Innenfläche des Zuleitungsrohrs (14) in einer Axialrichtung gebildet ist; und
    eine für eine Verbindung mit der Einsetzungsführungsnut (26) eingerichtete eingekerbte Verriegelungsnut (27) derart gebildet ist, dass es der Verriegelungsklaue (21) des Abstandhalters (17), die der Einsetzungsführungsnut (26) an einem äußeren Ende des Zuleitungsrohrs (14) nach der Einführung zugewandt ist, möglich ist, von der Einsetzungsführungsnut (26) aus in einer Umfangsrichtung gedreht zu werden.
  4. Gleichrichterbefestigungsstruktur nach Anspruch 2, wobei:
    die Gleichrichtereinheit ausgebildet ist, um befestigt zu werden, während ein Federring (25) in Zwischenlage zwischen gegenüberliegenden Flächen eines tiefsten Abschnitts des Zuleitungsrohrs (14) und einer inneren Endfläche der in das Zuleitungsrohr (14) eingesetzten Gleichrichtereinheit angeordnet ist.
  5. Gleichrichterbefestigungsstruktur nach einem der Ansprüche 2, 3 oder 4, ferner umfassend:
    ein Auslassrohr (15),
    wobei die Gleichrichtereinheit ausgebildet ist, um in ein Auslassrohr (15) eingesetzt und daran befestigt zu werden, das dafür ausgebildet ist, hinten an dem Durchflussratensensor (16) angeordnet zu sein, der an dem Zwischenabschnitt des Strömungskanals (13) in dem Durchflussmesser (11) vorgesehen ist.
EP04011281.5A 2003-06-30 2004-05-12 Gleichrichter Einheit und Befestigungsstruktur eines Gleichrichters Expired - Lifetime EP1493999B1 (de)

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
JP2003188856A JP4193612B2 (ja) 2003-06-30 2003-06-30 整流素子の取付け構造
JP2003188856 2003-06-30

Publications (3)

Publication Number Publication Date
EP1493999A2 EP1493999A2 (de) 2005-01-05
EP1493999A3 EP1493999A3 (de) 2007-09-05
EP1493999B1 true EP1493999B1 (de) 2017-09-06

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US (1) US6952960B2 (de)
EP (1) EP1493999B1 (de)
JP (1) JP4193612B2 (de)
CN (1) CN1294406C (de)

Families Citing this family (19)

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Publication number Priority date Publication date Assignee Title
US7415895B2 (en) 2005-08-26 2008-08-26 Smc Kabushiki Kaisha Flow meter with a rectifying module having a plurality of mesh members
JP4713397B2 (ja) * 2006-01-18 2011-06-29 株式会社リコー 微小流路構造体及び微小液滴生成システム
JP5066675B2 (ja) * 2006-07-05 2012-11-07 Ｓｍｃ株式会社 フローセンサ
JP2009185960A (ja) 2008-02-08 2009-08-20 Yamatake Corp 流体整流器及びこれを用いた流量計
TWD151437S (zh) * 2011-07-15 2013-01-21 Ｓｍｃ股份有限公司 電磁流量計
CN108980353B (zh) 2014-04-17 2021-02-02 肯发系统有限公司 用于接合高纯度流体通路的超密封垫圈
DE102014110101A1 (de) * 2014-07-18 2016-01-21 Friedrich Boysen Gmbh & Co. Kg Schalldämpfer
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US20040261519A1 (en) 2004-12-30
CN1294406C (zh) 2007-01-10
JP2005024352A (ja) 2005-01-27
EP1493999A3 (de) 2007-09-05
EP1493999A2 (de) 2005-01-05
JP4193612B2 (ja) 2008-12-10
CN1576802A (zh) 2005-02-09
US6952960B2 (en) 2005-10-11

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